<?php
/*
* 2007-2012 PrestaShop
*
* NOTICE OF LICENSE
*
* This source file is subject to the Open Software License (OSL 3.0)
* that is bundled with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://opensource.org/licenses/osl-3.0.php
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@prestashop.com so we can send you a copy immediately.
*
* DISCLAIMER
*
* Do not edit or add to this file if you wish to upgrade PrestaShop to newer
* versions in the future. If you wish to customize PrestaShop for your
* needs please refer to http://www.prestashop.com for more information.
*
*  @author PrestaShop SA <contact@prestashop.com>
*  @copyright  2007-2012 PrestaShop SA
*  @version  Release: $Revision: 17889 $
*  @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
*  International Registered Trademark & Property of PrestaShop SA
*/

class InstallSimplexmlElement extends SimpleXMLElement
{
	/**
	 * Can add SimpleXMLElement values in XML tree
	 *
	 * @see SimpleXMLElement::addChild()
	 */
	public function addChild($name, $value = null, $namespace = null)
	{
		if ($value instanceof SimplexmlElement)
		{
			$content = trim((string)$value);
			if (strlen($content) > 0)
				$new_element = parent::addChild($name, str_replace('&', '&amp;', $content), $namespace);
			else
			{
				$new_element = parent::addChild($name);
				foreach ($value->attributes() as $k => $v)
					$new_element->addAttribute($k, $v);
			}

			foreach ($value->children() as $child)
				$new_element->addChild($child->getName(), $child);
		}
		else
			return parent::addChild($name, str_replace('&', '&amp;', $value), $namespace);
	}

	/**
	 * Generate nice and sweet XML
	 *
	 * @see SimpleXMLElement::asXML()
	 */
	public function asXML($filename = null)
	{
		$dom = new DOMDocument('1.0');
		$dom->preserveWhiteSpace = false;
		$dom->formatOutput = true;
		$dom->loadXML(parent::asXML());

		if ($filename)
			return file_put_contents($filename, $dom->saveXML());
		return $dom->saveXML();
	}
}